Prior to the introduction of pre-measured self-contained ground coffee filter rings, fresh coffee grounds were measured out in scoopfuls and placed into the metal percolator basket. This process enabled small amounts of coffee grounds to leak into the fresh coffee. Additionally, the process left wet grounds in the percolator basket, which were very tedious to clean. The benefit of the Max Pax coffee filter rings was two-fold: First, because the amount of coffee contained in the rings was pre-measured, it negated the need to measure each scoop and then place it in the metal percolator basket. Second, the filter paper was strong enough to hold all the coffee grounds within the sealed paper. After use, the coffee filter ring could be easily removed from the basket and discarded. This saved the consumer from the tedious task of cleaning out the remaining wet coffee grounds from the percolator basket.
We opted to look only at “entry level” machines — those billed as semi-automatic and super-automatic — meaning they do some of the work for you. Manual machines, the third type, allow for more personalization but require a much longer learning curve and aren’t typically a good fit for first-time users. We also skipped models that couldn’t steam milk, ensuring that the best espresso maker is also the best cappuccino maker.